US10686245B2 - Back door, and glass antenna - Google Patents
Back door, and glass antenna Download PDFInfo
- Publication number
- US10686245B2 US10686245B2 US15/465,130 US201715465130A US10686245B2 US 10686245 B2 US10686245 B2 US 10686245B2 US 201715465130 A US201715465130 A US 201715465130A US 10686245 B2 US10686245 B2 US 10686245B2
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- antenna
- defogger
- feeding point
- wire
- antenna wire
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- 239000011521 glass Substances 0.000 title claims abstract description 113
- 229920005989 resin Polymers 0.000 claims description 32
- 239000011347 resin Substances 0.000 claims description 32
- 230000002093 peripheral effect Effects 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 26
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 description 29
- 230000035945 sensitivity Effects 0.000 description 14
- 239000004020 conductor Substances 0.000 description 7
- 239000000470 constituent Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1271—Supports; Mounting means for mounting on windscreens
- H01Q1/1278—Supports; Mounting means for mounting on windscreens in association with heating wires or layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/56—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens
- B60S1/58—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens for rear windows
- B60S1/586—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens for rear windows including defroster or demisting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
- H01Q1/3291—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted in or on other locations inside the vehicle or vehicle body
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0001—Arrangements for holding or mounting articles, not otherwise provided for characterised by position
Definitions
- the present invention relates to a back door, and a glass antenna.
- a rear glass of the back door generally has a small area in comparison with those in other vehicle models.
- almost all the region of the rear glass is occupied by a defogger.
- an antenna for AM (Amplitude Modulation) radio is disposed in the rear glass.
- a reception signal may leak from the defogger to a body of the vehicle, or noise from the body of the vehicle may be mixed into the reception signal. Therefore, when the defogger is used as an antenna for AM radio, a choke coil is used for blocking a signal in a frequency band of AM radio between the body of the vehicle and the defogger (for example, see Patent Document 1).
- Patent Document 1 JP-A-2015-56716
- An object of the present invention is to provide a back door and a glass antenna capable of achieving an inexpensive antenna in which external components can be reduced.
- the present invention has the following configurations.
- a back door made from resin to be openably and closably attached to a rear portion of a vehicle, the back door including a glass antenna,
- the glass antenna includes:
- a defogger including a plurality of heating wires and at least two bus bars which connect end portions of the heating wires so as to supply electric power to the heating wires;
- a first antenna wire which is disposed in regions of at least three sides in a peripheral region of the defogger, so as to receive radio waves in a first frequency band;
- a second antenna wire which is disposed in the peripheral region of the defogger, so as to receive radio waves in a second frequency band which is higher in frequency than the first frequency band;
- an amplification portion which synthesizes and amplifies a first reception signal received by the first antenna wire and a second reception signal received by the second antenna wire
- the glass antenna has no choke coil which blocks a signal of the first frequency band between a body of the vehicle and the defogger.
- the amplification portion is connected to the first antenna wire through a first feeding point and connected to the second antenna wire through a second feeding point;
- the first feeding point and the second feeding point are disposed in the peripheral region and outside a line along each of the at least two bus bars and an extension line of the line.
- the second feeding point is disposed in a position closer to the defogger than the first feeding point.
- the first antenna wire is disposed at a first distance or longer from the defogger
- the second antenna wire is disposed at a second distance from the defogger, the second distance being shorter than the first distance.
- the first antenna wire includes a meander-like conducting wire part
- an interval between conducting wires in the meander-like conducting wire part is shorter than an interval between the defogger and the first antenna wire.
- a defogger including a plurality of heating wires and at least two bus bars which connect end portions of the heating wires so as to supply electric power to the heating wires;
- a first antenna wire which is disposed in regions of at least three sides in a peripheral region of the defogger, so as to receive radio waves in a first frequency band;
- an amplification portion which synthesizes and amplifies a first reception signal received by the first antenna wire and a second reception signal received by the second antenna wire
- a glass antenna of the present invention it is possible to achieve an inexpensive antenna in which external components can be reduced.
- FIG. 1 is an outline view showing an example in which a back door and a glass antenna according to a first embodiment have been mounted on a vehicle.
- FIG. 2 is a view showing an internal configuration example of the back door according to the first embodiment.
- FIG. 3 is a view showing a configuration example of the glass antenna according to the first embodiment.
- FIG. 4 is a view showing a configuration example of a glass antenna according to a second embodiment.
- FIG. 5 is a view showing a configuration example of a glass antenna according to a third embodiment.
- FIG. 6 is a view showing a configuration example of a glass antenna according to a fourth embodiment.
- FIG. 7 is a view showing a configuration example of a glass antenna according to a fifth embodiment.
- FIG. 1 is an outline view showing an example in which a back door 1 and a glass antenna 100 according to a first embodiment have been mounted on a vehicle.
- FIG. 2 is a view showing an internal configuration view of the back door 1 according to the present embodiment.
- the back door 1 shown in FIG. 1 is openably and closably attached to a rear portion of a vehicle body 2 of a hatchback vehicle.
- the back door 1 is a door made from resin, including a resin panel 20 , metal frames ( 21 A and 21 B), and a glass antenna 100 .
- the metal frames ( 21 A and 21 B) and the glass antenna 100 are mounted between a resin outer panel (not shown) and a resin inner panel (not shown) of the resin panel 20 .
- the back door 1 is openably and closably attached to the vehicle body 2 through the metal frames ( 21 A and 21 B).
- the resin panel 20 (the resin outer panel and the resin inner panel) is formed of synthetic resin (such as polypropylene).
- the resin panel 20 can transmit radio waves in a frequency band of AM radio (an example of a first frequency band, ranging from 525 kHz (kilohertz) to 1,710 kHz) and a frequency band of FM (Frequency Modulation) radio (an example of a second frequency band, ranging from 76 MHz (megahertz) to 108 MHz).
- the resin panel 20 has an opening portion for visually recognizing a rear side of the vehicle.
- the metal frames ( 21 A and 21 B) are disposed between the resin outer panel and the resin inner panel, and provided for enhancing rigidity of the back door 1 .
- FIG. 2 shows an internal configuration example of the back door 1 in which the resin inner panel has been removed.
- the metal frame 21 A is attached to a left side portion of the back door 1
- the metal frame 21 B is attached to a right side portion of the back door 1 .
- the metal frame 21 A and the metal frame 21 B will be described as metal frames 21 when any one of the metal frames provided in the back door 1 is designated or when the metal frames provided in the back door 1 are not distinguished especially.
- the glass antenna 100 is disposed between the resin outer panel and the resin inner panel so that the rear side of the vehicle can be visually recognized.
- the glass antenna 100 has a rear glass 10 and a two-input amplifier 11 as shown in FIG. 2 .
- the rear glass 10 is, for example, formed of glass.
- the rear glass 10 is disposed in the opening portion of the resin panel 20 (the resin outer panel and the resin inner panel) so that the rear side of the vehicle can be visually recognized.
- the two-input amplifier 11 (an example of an amplification portion) is fixed to the metal frame 21 A, and electrically connected to the vehicle body 2 through the metal frame 21 A.
- the two-input amplifier 11 uses potential of the vehicle body 2 as reference potential (for example, ground).
- FIG. 3 is a view showing a configuration example of the glass antenna 100 according to the present embodiment.
- the glass antenna 100 shown in FIG. 3 has the rear glass 10 and the two-input amplifier 11 .
- a defogger 30 , an AM antenna 40 and an FM antenna 50 are disposed in the rear glass 10 .
- the defogger 30 is disposed at the center of the rear glass 10 .
- the defogger 30 has a plurality of heating wires 31 and at least two bus bars ( 32 A and 32 B).
- the defogger 30 heats the heating wires 31 by electric power supplied between the bus bar 32 A and the bus bar 32 B, so as to eliminate bedewing on the rear glass 10 .
- the two bus bars connect end portions of the heating wires 31 and supply electric power to the heating wires 31 .
- the bus bar 32 A is disposed on the left side of the defogger 30 when observed from the resin inner panel side
- the bus bar 32 B is disposed on the right side of the defogger 30 when observed from the resin inner panel side.
- the bus bar 32 A and the bus bar 32 B will be described as bus bars 32 when any one of the bus bars provided in the glass antenna 100 is designated or when the bus bars are not distinguished especially.
- the AM antenna 40 is an antenna for AM radio, which receives radio waves in a frequency band of AM radio.
- the AM antenna 40 has an AM feeding point 41 and an AM antenna wire 42 .
- the distance D 1 is a predetermined distance long enough to prevent leakage (attenuation) of a reception signal of the AM antenna wire 42 to the vehicle body 2 through the defogger 30 or to prevent noise from being mixed from the vehicle body 2 into the reception signal of the AM antenna wire 42 .
- the distance D 1 is 40 mm (millimeters).
- the AM antenna wire 42 includes an AM antenna wire 42 - 1 (AM element) extending to the right from the AM feeding point 41 , and an AM antenna wire 42 - 2 (AM element) extending to the left from the AM feeding point 41 .
- the FM feeding point 51 (an example of a second feeding point) is a terminal, which is constituted by a conductor such as metal so as to feed power to the FM antenna wire 52 .
- the FM feeding point 51 is disposed in the peripheral region of the defogger 30 within the rear glass 10 and outside a line along each of the at least two bus bars 32 and an extension line of the line (for example, the imaginary line L 1 ). That is, the FM feeding point 51 is disposed outside the imaginary line L 1 including a line along the bus bar 32 and an extension line of the line.
- the FM feeding point 51 is disposed in a position closer to the defogger 30 than the AM feeding point 41 .
- the FM antenna wire 52 (an example of a second antenna wire) is a conducting wire extending to the right from the FM feeding point 51 .
- the FM antenna wire 52 is disposed in the peripheral region of the defogger 30 (for example, the aforementioned upper region) so as to receive radio waves in the frequency band of FM radio which is higher than in frequency the frequency band of AM radio.
- the FM antenna wire 52 is disposed at a distance D 2 (an example of a second distance) from the defogger 30 .
- the distance D 2 is shorter than the distance D 1 . That is, the FM antenna wire 52 is disposed between the AM antenna wire 42 and the defogger 30 .
- the distance D 2 is determined so that the FM antenna wire 52 is capacitively coupled with the defogger 30 in the frequency band of FM radio.
- the distance D 2 is 5 mm.
- back door 1 according to the present embodiment it is therefore possible to achieve an inexpensive antenna in which external components can be reduced.
- back door 1 according to the present embodiment requires no choke coil, weight can be reduced.
- the back door 1 according to the present embodiment can be, for example, used in a low-priced popular vehicle.
- the two-input amplifier 11 is connected to the AM antenna wire 42 through an AM feeding point 41 (a first feeding point), and connected to the FM antenna wire 52 through an FM feeding point 51 (a second feeding point).
- the AM feeding point 41 and the FM feeding point 51 are disposed in the aforementioned peripheral region and outside a line along each of the at least two bus bars 32 and an extension line of the line (for example, an imaginary line L 1 ).
- the FM feeding point 51 is disposed in a position closer to the defogger 30 than the AM feeding point 41 .
- the FM antenna wire 52 is disposed between the defogger 30 and the AM antenna wire 42 .
- the back door 1 it is possible to reduce leakage (attenuation) of a reception signal of the AM antenna wire 42 through the defogger 30 , and noise mixed into the reception signal of the AM antenna wire 42 .
- the FM antenna wire 52 and the defogger 30 are capacitively coupled with each other so that receiving sensitivity of the FM antenna wire 52 can be improved.
- the glass antenna 100 is used in the back door 1 which is made from resin and is to be openably and closably attached to the rear portion of the vehicle.
- the glass antenna 100 includes the defogger 30 , the AM antenna wire 42 , the FM antenna wire 52 , and the two-input amplifier 11 .
- the glass antenna 100 has no choke coil which blocks a signal in the frequency band of AM radio between the vehicle body 2 (the body of the vehicle) and the defogger 30 .
- the glass antenna 100 in the same manner as in the back door 1 , it is possible to achieve a low-priced antenna in which external components can be reduced, and it is possible to reduce the weight of the antenna.
- FIG. 4 is a view showing a configuration example of the glass antenna 100 a according to the second embodiment.
- the glass antenna 100 a shown in FIG. 4 has a rear glass 10 a and a two-input amplifier 11 .
- a defogger 30 , an AM antenna 40 a and an FM antenna 50 a are disposed in the rear glass 10 a .
- constituent members which are the same as those in FIG. 3 are referenced correspondingly, and description thereof will be omitted.
- the AM feeding point 41 a (an example of a first feeding point) is a terminal, which is constituted by a conductor such as metal so as to feed power to the AM antenna wire 42 a .
- the AM feeding point 41 a is fundamentally the same as the AM feeding point 41 in the first embodiment, but the AM feeding point 41 a is disposed in a position farther from the defogger 30 in a parallel direction to the heating wires 31 than the AM feeding point 41 in the first embodiment.
- the AM feeding point 41 a is disposed in a position displaced obliquely from an FM feeding point 51 a in a direction leaving the defogger 30 .
- the AM antenna wire 42 a (an example of a first antenna wire) is a conducting wire such as metal, which is fundamentally the same as the AM antenna wire 42 in the first embodiment.
- the AM antenna wire 42 a is disposed over regions of four sides in a peripheral region of the defogger 30 (i.e., an upper region on the upper side of the heating wires 31 , a left region on the left side of the bus bar 32 A, a right region on the right side of the bus bar 32 B, and a lower region on the lower side of the heating wires 31 ).
- the AM antenna wire 42 a includes an AM antenna wire 42 a - 1 (AM element) extending to the right from the AM feeding point 41 a , and an AM antenna wire 42 a - 2 (AM element) extending downward from the AM feeding point 41 a.
- the loop portion 43 is a conducting wire pattern like a loop.
- An interval between conducting wires in the loop-like conducting wire pattern is a distance D 3 in the same manner as the interval between conducting wires in the folded-back pattern of the AM antenna wire 42 - 1 .
- the distance D 3 is shorter than the distance D 1 .
- the distance D 3 is 10 mm.
- the distance D 3 is determined so that the conducting wires can be capacitively coupled with each other in the frequency band of AM radio.
- the meander portion 45 is a conducting wire pattern like a meander, extending outward from the closer side to the defogger 30 .
- An interval between conducting wires in the meander-like conducting wire pattern is a distance D 3 in the same manner as the interval between conducting wires in the folded-back pattern of the AM antenna wire 42 - 1 .
- the distance D 3 is 10 mm.
- the AM antenna wire 42 a - 2 is a conducting wire disposed in the aforementioned left region and the aforementioned lower region, and having a meander portion 44 in the left region.
- the meander portion 44 is a conducting wire pattern like a meander, extending outward from the closer side to the defogger 30 .
- An interval between conducting wires in the meander-like conducting wire pattern is a distance D 3 in the same manner as the interval between conducting wires in the folded-back pattern of the AM antenna wire 42 - 1 .
- the distance D 3 is 10 mm.
- the FM antenna 50 a is an antenna for FM radio, which receives radio waves in a frequency band of FM radio.
- the FM antenna 50 a has an FM feeding point 51 a and an FM antenna wire 52 a.
- the FM antenna wire 52 a (an example of a second antenna wire) is a conducting wire extending to the right from the FM feeding point 51 a .
- the FM antenna wire 52 a is fundamentally the same as the FM antenna wire 52 in the first embodiment.
- the FM antenna wire 52 a is disposed at a distance D 2 from the defogger 30 .
- the distance D 2 is determined so that the FM antenna wire 52 a is capacitively coupled with the defogger 30 in the frequency band of FM radio.
- the distance D 2 is 5 mm.
- the AM antenna wire 42 a is disposed in regions of four sides in the peripheral region of the defogger 30 .
- the AM antenna wire 42 a has the meander-like conducting wire parts (the meander portions 44 and 45 ).
- the interval (distance D 3 ) between conducting wires in the meander-like conducting wire parts (the meander portions 44 and 45 ) is shorter than the interval (distance D 1 ) between the defogger 30 and the AM antenna wire 42 a.
- the AM antenna 40 a can be expanded to the lower region from the meander portions 44 and 45 in the left region and the right region. That is, in the back door 1 a and the glass antenna 100 a according to the present embodiment, it is possible to improve expandability and a degree of freedom in the layout of the AM antenna 40 a.
- the interval (distance D 3 ) between conducting wires in the meander-like conducting wire parts (meander portions 44 and 45 ) is determined so that the conducting wires are capacitively coupled with each other in the frequency band of AM radio.
- each of the meander portions 44 and 45 has a function equivalent to a thick conducting wire (a conducting wire with a width corresponding to the distance D 3 ).
- a thick conducting wire a conducting wire with a width corresponding to the distance D 3 .
- the AM antenna wire 42 a has a loop-like conducting wire part (loop portion 43 ).
- the interval (distance D 3 ) between conducting wires in the loop-like conducting wire part (loop portion 43 ) is shorter than the interval (distance D 1 ) between the defogger 30 and the AM antenna wire 42 a , and is determined so that the conducting wires are capacitively coupled with each other in the frequency band of AM radio.
- the loop-like conducting wire part (loop portion 43 ) has a function equivalent to a thick conducting wire (a conducting wire with a width corresponding to the distance D 3 ).
- the AM feeding point 41 a and the FM feeding point 51 a are disposed obliquely, and disposed further outside in comparison with those in the first embodiment.
- the wiring length for connection to the two-input amplifier 11 from the AM feeding point 41 a and the FM feeding point 51 a can be made shorter than that in the first embodiment. Accordingly, in the back door 1 a and the glass antenna 100 a according to the present embodiment, the possibility that noise may be mixed into a reception signal from the wiring can be further reduced. Thus, it is possible to further improve the receiving sensitivity of the antenna.
- FIG. 5 is a view showing a configuration example of the glass antenna 100 b according to the third embodiment.
- a back door 1 b according to the third embodiment is the same as the back door 1 according to the first embodiment, except that the glass antenna 100 b is provided in place of the glass antenna 100 . Therefore, description of the back door 1 b will be omitted.
- the glass antenna 100 b shown in FIG. 5 has a rear glass 10 b and a two-input amplifier 11 .
- a defogger 30 , an AM antenna 40 b and an FM antenna 50 b are disposed in the rear glass 10 b .
- constituent members which are the same as those in FIG. 3 are referenced correspondingly, and description thereof will be omitted.
- the AM antenna 40 b is an antenna for AM radio, which receives radio waves in a frequency band of AM radio.
- the AM antenna 40 b has an AM feeding point 41 b and an AM antenna wire 42 b .
- the AM antenna 40 b is the same as the AM antenna 40 in the first embodiment, except that the layout of the AM feeding point 41 b and the conducting wire pattern of the AM antenna wire 42 b are different.
- the AM feeding point 41 b (an example of a first feeding point) is a terminal, which is constituted by a conductor such as metal so as to feed power to the AM antenna wire 42 b .
- the AM feeding point 41 b is fundamentally the same as the AM feeding point 41 in the first embodiment, but the AM feeding point 41 b is disposed in a position farther from the defogger 30 in a parallel direction to the heating wires 31 than the AM feeding point 41 in the first embodiment.
- the AM antenna wire 42 b (an example of a first antenna wire) is a conducting wire such as metal, which is fundamentally the same as the AM antenna wire 42 in the first embodiment.
- the AM antenna wire 42 b includes an AM antenna wire 42 b - 1 (AM element) extending to the right from the AM feeding point 41 b , and an AM antenna wire 42 b - 2 (AM element) extending downward from the AM feeding point 41 b.
- the AM antenna wire 42 b - 1 is a conducting wire disposed in the aforementioned upper region and the aforementioned right region, and having no folded-back pattern.
- the AM antenna wire 42 b - 2 is a conducting wire disposed in the aforementioned left region, and having a folded-back pattern in the left region.
- the FM antenna 50 b is an antenna for FM radio, which receives radio waves in a frequency band of FM radio.
- the FM antenna 50 b has an FM feeding point 51 b and an FM antenna wire 52 b.
- the FM feeding point 51 b (an example of a second feeding point) is a terminal, which is constituted by a conductor such as metal so as to feed power to the FM antenna wire 52 b .
- the FM feeding point 51 b is fundamentally the same as the FM feeding point 51 in the first embodiment, but the FM feeding point 51 b is disposed on the left side of the defogger 30 (in the left region).
- the FM antenna wire 52 b (an example of a second antenna wire) is a conducting wire extending to the right from the FM feeding point 51 b through a crank-like conducting wire pattern.
- the FM antenna wire 52 b is fundamentally the same as the FM antenna wire 52 in the first embodiment.
- the AM antenna wire 42 b is disposed in regions of three sides in the peripheral region of the defogger 30 .
- the FM feeding point 51 b is disposed on the left side of the defogger 30 (in the left region).
- the wiring length for connection from the AM feeding point 41 b and the FM feeding point 51 b to the two-input amplifier 11 can be further shortened. Accordingly, in the back door 1 b and the glass antenna 100 b according to the present embodiment, the possibility that noise may be mixed into a reception signal from the wiring can be further reduced. Thus, it is possible to further improve the receiving sensitivity of the antenna.
- FIG. 6 is a view showing a configuration example of the glass antenna 100 c according to the fourth embodiment.
- a back door 1 c according to the fourth embodiment is the same as the back door 1 b according to the third embodiment, except that the glass antenna 100 c is provided in place of the glass antenna 100 b . Therefore, description of the back door 1 c will be omitted.
- the glass antenna 100 c shown in FIG. 6 has a rear glass 10 c , a two-input amplifier 11 , and a DAB (Digital Audio Broadcast) amplifier 12 .
- a defogger 30 , an AM antenna 40 b , an FM antenna 50 b , and a DAB antenna 60 are disposed in the rear glass 10 c .
- constituent members which are the same as those in FIG. 5 are referenced correspondingly, and description thereof will be omitted.
- the present embodiment is the same as the third embodiment, except that the glass antenna 100 c includes the DAB antenna 60 and the DAB amplifier 12 .
- the DAB antenna 60 is an antenna for DAB, which receives radio waves in a frequency band of DAB which is higher in frequency than a frequency band of FM radio.
- DAB includes two different frequency bands, that is, band III ranging from 174 MHz to 240 MHz, and L-band ranging from 1,452 MHz to 1,492 MHz.
- the DAB antenna 60 has a DAB feeding point 61 , and a DAB antenna wire 62 .
- the DAB feeding point 61 (an example of a third feeding point) is a terminal, which is constituted by a conductor such as metal so as to feed power to the DAB antenna wire 62 .
- the DAB feeding point 61 is disposed in the peripheral region of the defogger 30 within the rear glass 10 c and outside a line along each of the at least two bus bars 32 and an extension line of the line (for example, an imaginary line L 2 ). That is, the DAB feeding point 61 is disposed outside the imaginary line L 2 including a line along the bus bar 32 B and an extension line of the line.
- the DAB antenna wire 62 (an example of a third antenna wire) is a conducting wire extending to the right from the DAB feeding point 61 .
- the DAB antenna wire 62 is disposed in the peripheral region of the defogger 30 (for example, in the aforementioned right region) so as to receive radio waves in the frequency band of DAB.
- the DAB amplifier 12 is connected to the DAB antenna wire 62 through the DAB feeding point 61 .
- the DAB amplifier 12 amplifies a reception signal (an example of a third reception signal) received by the DAB antenna wire 62 .
- a reception signal an example of a third reception signal
- the DAB amplifier 12 shown in FIG. 6 is disposed above the rear glass 10 c for convenience of explanation, the DAB amplifier 12 is, for example, fixed to the metal frame 21 B.
- the DAB amplifier 12 outputs the amplified reception signal as an output signal to devices such as a car radio system and a car audio system.
- the DAB antenna 60 and the DAB amplifier 12 are further provided.
- the back door 1 c and the glass antenna 100 c according to the present embodiment it is possible to improve receiving sensitivity in the frequency band of AM radio, while it is also possible to receive radio waves in the frequency band of DAB.
- the back door 1 c and the glass antenna 100 c according to the present embodiment it is possible to achieve a low-priced antenna in which external components can be reduced.
- FIG. 7 is a view showing a configuration example of the glass antenna 100 d according to the fifth embodiment.
- a back door 1 d according to the fifth embodiment is the same as the back door 1 in the first embodiment, except that the glass antenna 100 d is provided in place of the glass antenna 100 . Therefore, description of the back door 1 d will be omitted.
- the glass antenna 100 d shown in FIG. 7 has a rear glass 10 d and a two-input amplifier 11 .
- a defogger 30 , an AM antenna 40 , an FM antenna 50 , and an adjustment element 53 , and RFC coils 13 (high-frequency choke coils) are disposed in the rear glass 10 d .
- constituent members which are the same as those in FIG. 3 are referenced correspondingly, and description thereof will be omitted.
- the present embodiment is the same as the first embodiment, except that the glass antenna 100 d includes the adjustment element 53 and the RFC coils 13 .
- the defogger 30 can be floated from the ground (reference potential of a body of a vehicle) in a frequency band of FM radio.
- a reception signal of radio waves in the frequency band of FM radio received by the defogger 30 can be transmitted to the FM antenna 50 by capacitive coupling.
- the adjustment element 53 is an element for adjusting impedance of the defogger 30 .
- the adjustment element 53 serves as an element for adjusting the FM antenna 50 .
- the RFC coils 13 and the adjustment element 53 are further provided.
- the present invention is not limited to any one of the aforementioned embodiments.
- the present invention can be modified without departing from the gist of the present invention.
- the shapes and arrangements of the AM antenna 40 ( 40 a , 40 b ) and the FM antenna 50 ( 50 a , 50 b ) are not limited to those in any one of the embodiments, but the shapes and arrangements thereof may be changed without departing from the gist of the present invention.
- the back door 1 ( 1 a to 1 d ) is a door that can be opened and closed vertically, it may be a door that can be opened and closed horizontally.
- the shape of the metal frame 21 is not limited to that in the embodiment, but it may be replaced by another shape.
- the metal frame 21 is put at a distance from the AM antenna 40 ( 40 a , 40 b )
- receiving sensitivity of the AM antenna 40 ( 40 a , 40 b ) can be improved. It is therefore preferable that the metal frame 21 has a shape that can be disposed at a distance from the AM antenna 40 ( 40 a , 40 b ).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Remote Sensing (AREA)
- Details Of Aerials (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Support Of Aerials (AREA)
Abstract
Description
-
- 1, 1 a, 1 b, 1 c, 1 d back door
- 2 vehicle body
- 10, 10 a, 10 b, 10 c, 10 d rear glass
- 11 two-input amplifier
- 12 DAB amplifier
- 13 RFC coils
- 20 resin panel
- 21, 21A, 21B metal frame
- 30 defogger
- 31 heating wires
- 32, 32A, 32B bus bar
- 40, 40 a, 40 b AM antenna
- 41, 41 a, 41 b AM feeding point
- 42, 42-1, 42-2, 42 a, 42 a-1, 42 a-2, 42 b, 42 b-1, 42 b-2 AM antenna wire
- 43 loop portion
- 44, 45 meander portion
- 50, 50 a, 50 b FM antenna
- 51, 51 a, 51 b FM feeding point
- 52, 52 a, 52 b FM antenna wire
- 53 adjustment element
- 60 DAB antenna
- 61 DAB feeding point
- 62 DAB antenna wire
- 100, 100 a, 100 b, 100 c, 100 d glass antenna
Claims (14)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016-057453 | 2016-03-22 | ||
JP2016057453A JP2017175290A (en) | 2016-03-22 | 2016-03-22 | Back door and glass antenna |
Publications (2)
Publication Number | Publication Date |
---|---|
US20170279182A1 US20170279182A1 (en) | 2017-09-28 |
US10686245B2 true US10686245B2 (en) | 2020-06-16 |
Family
ID=58401328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/465,130 Active 2037-06-06 US10686245B2 (en) | 2016-03-22 | 2017-03-21 | Back door, and glass antenna |
Country Status (4)
Country | Link |
---|---|
US (1) | US10686245B2 (en) |
EP (1) | EP3223361B1 (en) |
JP (1) | JP2017175290A (en) |
CN (1) | CN107215315B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7138658B2 (en) * | 2017-12-06 | 2022-09-16 | 日本板硝子株式会社 | rear glass |
WO2019177098A1 (en) * | 2018-03-16 | 2019-09-19 | 日本板硝子株式会社 | Rear glass |
JP7283269B2 (en) | 2019-06-28 | 2023-05-30 | Agc株式会社 | Back door and rear glass |
JP2023023135A (en) * | 2021-08-04 | 2023-02-16 | Agc株式会社 | Window glass for vehicle |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5049892A (en) * | 1989-04-06 | 1991-09-17 | Hans Kolbe & Co. Nachrichtenubertragungstechnik | Pane antenna system having four terminal networks |
US5557289A (en) | 1992-11-30 | 1996-09-17 | Nippon Sheet Glass Co., Ltd. | Window glass antenna device for automobiles |
JPH098527A (en) | 1995-04-17 | 1997-01-10 | Asahi Glass Co Ltd | Glass antenna system for automobile |
JPH09181513A (en) | 1995-12-22 | 1997-07-11 | Asahi Glass Co Ltd | Glass antenna system for automobile |
EP1177596A1 (en) | 1999-05-13 | 2002-02-06 | Nippon Sheet Glass Co., Ltd. | Glass antenna device for vehicle and radio receiver apparatus using the same |
US20040056810A1 (en) | 2001-01-04 | 2004-03-25 | Hidetoshi Oka | Glass antenna and glass antenna system using the same |
US20050035913A1 (en) * | 2001-09-20 | 2005-02-17 | Detlef Baranski | Double on-glass slot antenna |
US20060152421A1 (en) | 2002-09-17 | 2006-07-13 | Detlef Baranski | Antenna pane |
WO2008096751A1 (en) | 2007-02-06 | 2008-08-14 | Nippon Sheet Glass Company, Limited | Vehicle glass antenna |
JP2010011005A (en) | 2008-06-26 | 2010-01-14 | Nippon Sheet Glass Co Ltd | Windowpane for automobile |
US20110043419A1 (en) * | 2008-09-16 | 2011-02-24 | Central Glass Company, Limited | Glass Antenna for Vehicle |
JP2015056716A (en) | 2013-09-11 | 2015-03-23 | セントラル硝子株式会社 | Back door and glass antenna |
WO2015093490A1 (en) | 2013-12-20 | 2015-06-25 | 旭硝子株式会社 | Antenna system |
JP2016025604A (en) | 2014-07-24 | 2016-02-08 | セントラル硝子株式会社 | Glass antenna and back door |
-
2016
- 2016-03-22 JP JP2016057453A patent/JP2017175290A/en active Pending
-
2017
- 2017-03-21 US US15/465,130 patent/US10686245B2/en active Active
- 2017-03-21 EP EP17000462.6A patent/EP3223361B1/en active Active
- 2017-03-22 CN CN201710173660.3A patent/CN107215315B/en active Active
Patent Citations (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5049892A (en) * | 1989-04-06 | 1991-09-17 | Hans Kolbe & Co. Nachrichtenubertragungstechnik | Pane antenna system having four terminal networks |
US5557289A (en) | 1992-11-30 | 1996-09-17 | Nippon Sheet Glass Co., Ltd. | Window glass antenna device for automobiles |
JPH098527A (en) | 1995-04-17 | 1997-01-10 | Asahi Glass Co Ltd | Glass antenna system for automobile |
JPH09181513A (en) | 1995-12-22 | 1997-07-11 | Asahi Glass Co Ltd | Glass antenna system for automobile |
EP1177596A1 (en) | 1999-05-13 | 2002-02-06 | Nippon Sheet Glass Co., Ltd. | Glass antenna device for vehicle and radio receiver apparatus using the same |
US20040056810A1 (en) | 2001-01-04 | 2004-03-25 | Hidetoshi Oka | Glass antenna and glass antenna system using the same |
US20050035913A1 (en) * | 2001-09-20 | 2005-02-17 | Detlef Baranski | Double on-glass slot antenna |
US20060152421A1 (en) | 2002-09-17 | 2006-07-13 | Detlef Baranski | Antenna pane |
WO2008096751A1 (en) | 2007-02-06 | 2008-08-14 | Nippon Sheet Glass Company, Limited | Vehicle glass antenna |
EP2109181A1 (en) | 2007-02-06 | 2009-10-14 | Nippon Sheet Glass Company Limited | Vehicle glass antenna |
JP2010011005A (en) | 2008-06-26 | 2010-01-14 | Nippon Sheet Glass Co Ltd | Windowpane for automobile |
EP2299538A1 (en) | 2008-06-26 | 2011-03-23 | Nippon Sheet Glass Company Limited | Window glass for automobile |
US20110043419A1 (en) * | 2008-09-16 | 2011-02-24 | Central Glass Company, Limited | Glass Antenna for Vehicle |
JP2015056716A (en) | 2013-09-11 | 2015-03-23 | セントラル硝子株式会社 | Back door and glass antenna |
WO2015093490A1 (en) | 2013-12-20 | 2015-06-25 | 旭硝子株式会社 | Antenna system |
US20160269059A1 (en) | 2013-12-20 | 2016-09-15 | Asahi Glass Company, Limited | Antenna system |
JP2016025604A (en) | 2014-07-24 | 2016-02-08 | セントラル硝子株式会社 | Glass antenna and back door |
Non-Patent Citations (1)
Title |
---|
Extended European Search Report for European Patent Application No. 17000462.6 dated Aug. 23, 2017. |
Also Published As
Publication number | Publication date |
---|---|
EP3223361B1 (en) | 2021-01-13 |
JP2017175290A (en) | 2017-09-28 |
CN107215315B (en) | 2021-11-02 |
CN107215315A (en) | 2017-09-29 |
EP3223361A1 (en) | 2017-09-27 |
US20170279182A1 (en) | 2017-09-28 |
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